I dont currently have any betta fish but I do have a breeding pair of angels. I just really want to know some of the basics, so here goes. First do betta fish like angels form a life long pair or will males spawn with multiple feamles and vise versa? What temp and ph is good for them to breed at? In my angel tank I currently have 1 breeding pair of a gold angel (male) and a black marbel with some yellow highlights (female) and I run it at 84 F and 6.2 ph and they seem to breed very well and have very healthy fry. Is there anything I can do to give them a boost to start spawning/pair up? Is it ok to put mabey 4 - 6 females to 1 male in a 29 tall to get a pair then move the pair to another tank? Do I have to move the pair or is a breeding box ok? Finally What betta would be the best to start with short fin, veil fin, half moon or just whatever I can get from the lfs for now? Thanks for any help you can give!!

Betta fish will bred with any other betta fish, male and female alike, though it has been noticed that some bettas, especially males get fixated on a certain color of female. I have had males that would not breed with ANY light body female, but any DARK body female was fine with him, and I have had males that will not breed to anything but a certain exact color of female.

I have found that bettas spawn in any PH water, and it is actually best to have them spawn in whatever water you have, unless it is outrageously hard, or something. It is called adapting the fish to the water, instead of the water to the fish, this way you also don't have to muck around with PH adjusters, ect..
The best temps for breeding are IMO 79-81. warmer than that, and the babies develop too fast, and don't form properly, and lower than that and they develop too slow, and many of them run out of egg yolk before they are free swimming, and death is the result of both.

The best thing to boost a pair and get them into breeding mood is plenty of food, preferably live, though frozen is good too. One trick I and a few others do is cut down on the water changes while increasing the food, then put them, when they are at the peak of conditioning, in the spawning tank, with all that clean water.. esp right before a weather front, and to the bettas, it is like there was just a rain after a drought, and they will get to work pretty fast, usually.

I would not advise doing that.
You pick the female you want. Putting one male in with all those females is a call to disaster. The females will fight to determine who gets to breed, even if there is already an established pecking order.
Te male could get harried by the females, and if they start to spawn, you'll have to move all the other fish, because if you move the pair, they might not go back to spawning, and if you wait until it is over, the other females could have very well eaten the eggs as they were spawning, and even if not, the male is like;y to eat the eggs if you disturb him after the fact.
There are some circumstances where a male will breed with all the available females, but that serves to exhaust him, because taking care of all those eggs and fry is a herculean task, and if he is lacking in experience, he'll probably abandon the nest, or eat all the eggs out of frustration.

You will have to move the pair, they will need at least a 5 gallon to spawn in, though most recommend a 10 gallon. The fry would have two be in there for at least a couple weeks before it is safe to move them, then the 29 would be an excellent grow out.

Get what you want, just remember, it costs the same to raise a VT as it does any of the others. PKs (short tails) they can be highly aggressive in their spawning, and they can really throw you off. HMs can be picky, and lazy, and not want to breed..
CTs can be just as agressive as PKs..
Just get what you want, though to be sure, there is more demand for the other tail types than there is for VTs.