My favored loadout is a Devastator with medium engine w/nitro, twin .70-cals, and dumped the rest into armor. Reasonably agile, good speed (especially with nitro), good firepower, and enough armor to take a beating. When I was first playing, I found a couple guides online, one of which mentioned that in the heyday of CS online, most servers banned autogyros and rear turrets. Now I don't know what whether that rule still holds, but you might want to check it out.
When I was looking at that guide, I also heard of a special loadout for the Bloodhawk: heavy engine w/nitro, twin .70-cals, near max armor and NO rockets. As the guide said, it'll outperform almost anything, but you'll have to fly and shoot like the devil.
Good judgement comes from experience. Experience comes from bad judgement.
"Is it heavy?" "Yes." "Then it's expensive - put 'em back." -Jurassic Park
With me surprises are rarely unexpected. - Any Pink Panther movie