Do not spend $ @ this point. You are going to hit the earth a "few" times.
Things for 3D
Low wing loading (light plane/engine combo)
Big Dia low pitch prop
Ultra reliable engine with a perfect mid range (no hesitation)
Fast precise servo's (run 6V and digital)
Radio with mix
Huge throws and run expo 60% to start, adjust from there
Properly trimmed plane (find a pattern flyer to help you with this)
Rear CG (see above)
Big clackers and be willing to go low (eye level or better) see first line
Flight sim to learn new moves (will help keep the earth from testing your plane as often) see line one
Once the Seagull is done get a better plane.
My 3D fleet
Omp Edge 40 size ARF
Swany MoJo 60 Primo 40
Kalteisen Skeeter 30, Skeeter 36, KX2
Value Hobby Sabre
3DH Sukhoi
Maxair Velox
plus a couple of indoor depron foamys for winter gym flying