Well Trinity is designed to get a decent graphic and decent processing keeping the budget in mind.
What you need is a good processing capability per core.
Bulldozer is out there with 8 cores , and most of Core I-5 SB with 4 cores.
However if you match the performance per core wise , you will find SB dancing circles around FX.
A quad-core CPU will be enough for average video editing and development.
Spend on a good quad-core SB CPU, rather than FX , it will be worth it.