I can answer some of your questions,. You can custom order the leotards. So you choose the style, color, rhinestones etc. The price is determined by all that you choose. It does take a couple months to receive the custom order. You can design the leotard on the website. Usually companies will send sizing samples to help determine what sizes to order. Once you know the girls sizes you can place the order.
Just remember that girls tend to grow, so you don't want to order them too early. MY OG had a growth spurt in between measurements / sizing and receiving the leotard order this season.
You are going to want the leotards to fit the girls (hopefully) for 2 years, because they ARE expensive, so it is always best to get the larger size if they are close.
Also, you will want to wait until they have the 2014-15 Competitive Catalog come out because it would be terrible to order a style that is being discontinued (BT/DT with GK and the leotard was $50 more the next season, but unavailable after December and we had 2 girls join team in January).
You may want to look at the catalog online. Long sleeve leotards range from $84.99 to $159.99.
Tank leos range from $49.00 to $79.00.
Since you have an Xcel team, I would definitely try to keep the competition leotards UNDER $90. (I know you said you like Adidas, but I have to say that our team switched to Alpha Factor this season and we have a leo with bling (sequinz) on it and they were under $80. We also got blinged out bags (big enough to hold all their stuff including shoes and a coat), blinged out jackets, and pants and the total was only $195. They have other options too.
Or for Warm ups and Bags, you could go through GTM. They have a lot of VERY reasonably priced warm-ups and bags.
Good luck.