What are the best beginner paintball guns?

Im looking to buy a paintball gun. I went to my local shop and he recommended the tippmann 98 custom pro. I thought this was a really really nice gun but i was wondering about other guns. I have played woodsball a few times but i was thinking about electronic guns from the 0-0 range. Any help and suggestions are appreciated.

should I buy an AR-15 or a SAIGA and convert it?

I turn 18 in a week and would like to purchase a rifle. should I buy an AR-15 or a SAIGA and convert it? The SAIGA is a lot cheaper and it is easy to convert to look like an AK-47. Or I might just buy an AK-47 they are only 0 at a local shop.

What is better buying a gun at a shop or buying it at a gun show?

I know its cheap to buy it at a gun show but the only thing that worries me is that what if something happens with a gun the show is not going to be there to look at it. The gun I am talking about is a Sig Mosquito its for 390 at a local shop for a black one. Please let me know I don't know what should i do thanks in advance. any help is appreciated