I use JR 821 on My 90 size pattern ship. For 30$ you get:
Type
igital
Torque:72 oz/in @ 4.8v, 88 oz/in @6v
Speed:.19 sec/60° @ 4.8v, .15 sec/60° @ 6v
BTW you can get them from the unmentionable auction site for as low as 25$ shipped to UK when you buy 4. Can't beat that!
If I have to rate the budget I'd spend by surfaces then I'd say:
1 elevator
2 aileron
3 rudder
4 throttle