Welcome, and congrats! We all love hedgie pictures, so make sure you post some when you get your little one!
And for the cage I was wondering if a 20 gallon tank plus one of those toppers with different ramps on it would be big enough
You have to be super careful with ramps/levels. It's really easy for hedgie's to fall and injure themselves. Check out this post for some good cage examples : http://www.hedgehogcentral.com/forums/viewtopic.php?f=8&t=554&p=5040&hilit=cage+examples#p5040
. You can also run a "cage" search on the forum and see what else you can find.
I heard SPIKES DELITE was the best
We use Spike's Delight and everyone seems to love it. That being said there's a consensus pretty much everywhere I read that there a better cat foods out there than any hedgie-specific foods. I'm pretty sure a few breeders on here have their own mixes they sell. I think that will be the route I go next time I need food. Again, if you run a search for "food" or browse around the diet/nutrition board, you'll find a lot of suggestions.
Umm... also I was wondering if my sisters gerbils would be able to play with it
I'm not sure. The only way to find out is to try it. Just make sure everyone is supervised at ALL TIMES
and also of course a food bowl and a water bottle
I would also include a bowl for water in his/her cage too. Sometimes hedgies drink more from bowls. Then again, that's another debate going on in this forums. If you search around the Housing/Accessories board, you'll find a few discussions on bottles vs. bowls.
For bedding I heard Aspen was the best. I was thinking for a bed I would get a smaller cat bed, and an igloo type thing
Personally, I use fleece liners for the cage and all my guys seem to love them. They're eco-friendly and easy enough to clean. AGAIN, bedding is a huge debate on this forum too, so check out the threads about bedding in the Housing/Accessories board while you're there. As fas as the cat bed thing.. your hedgie might like it and they may not. They're huge fans of burrowing, so most of us (including myself) just give them a snuggle bag, snuggle tent, or even an old t-shirt to sleep under. The cat bed may just be slept under and not on. But try it, maybe he/she will enjoy it.
Sorry everything is out of order to your post (I answered them in the order my opinions came to me
). Hope this gives you some ideas! And I'm sure you'll get 2039580349580192384109 of more ideas/suggestions/opinions! Good Luck!!