I just went through the same qunadry you are going through now. I shot a lot of bows. I ended up with a Patriot but only because a dealer sold it to me for dealer cost because it was a special order and the guy stood them up.
In shooting the Bowtech shorter bows (Mighty Mite, Defender, Justice and Tom Kat) I liked the buttery smoothness of the Justice (a shorter Liberty) but the speed fell off a bit from the others. The Defender (shorter Allegience) I shot kicked the manure out of the others as far as arrow speed goes. The Mighty Mite although it has an faster advertised arrow speed it just couldn'tkeep up withthe Defender and its dual cams.
For the money it's tought o beat the Tom Kat. You get the full meal deal with sights, rest, sling,etc. for far less than the other bows and you'll still have money left to buy arrows a nice release and maybe even a lazer range finder. The Tom Kat is a heck of bang for the buck! IfI were in your shoes I'd buy one and enjoy it and when and if the finances permit you can always upgrade but you'll never forget the fun times you had afield with your Tom Kat.
I noticednew Tom Katsare really cheap on E bay but beware. I don't know how hard over they are but Bowtech's owners manual makes a point of saying they will not offer a warranty on bows purchased over the internet.

Best of luck

Hollow Point