I may not be the right one to chime in but...I'm a gear whore, I love the stuff. 2 piece 1 piece it all good but has to be leather.
I like Teknic stuff great price points. I find the sizing to be close, I wear a 42 sport coat and I have a 42 two piece Teknic that should be a 40. I also have a one piece Teknic that should be a 42 see what I'm saying.
I mostly wear one piece suits, I have an Alpinestars 1 piece 42 fits awesome, also a Speed and Strength 1 piece in a 42 fits really well.
I find Joe Rocket stuff to fit larger say a North American cut.
But my favourite suit by far is my Alren Ness 1 piece 40 I think very true to size.
I love Sidi boots, I find they fit a tad narrow go up half a size. Mind you I have duck feet.
As for gloves I'm using some Knox Handroids they are ok a little flash and gimmicky, I find them narrow across the palms mind you again my hands are like my feet wider than they are long.
My fave gloves if you can afford them are my Helds can't go wrong with any of them for fit comfort and quality.
I'm not a big fan of used gear...other peoples funk and all but I love closeouts like already mentioned check return policies.
But you have to try on sorry but it may be worth it for you to drive a bit to somewhere where trying on first is an option.
Btw I'm 5'7" athletic build, wide through the shoulders and upper back, slim in the waist and muscular but slim legs from football and martial arts.