Cameron,
x mod would give prolly give you more bang for your buck. Though it seems A mod may be close to what your spending there are various hidden costs to an A mod you usually dont see until your in one. ie guys up here in aztec got 3500-4000 in shock packages alone, need a very good fuel system for alcohol plus a spare, mods burn up tires 2x faster, chassis bend easy, motor program gotta be decent at the least. X MOD deal is great to use as a step to a A mod or not (wish we had them in aztec) just a few things to be aware of before making the switch. If A mod is really what you want go for it! If its a switch just cuz the costs seem similar i would do x mod instead. Good luck whatever decision you decide.