You're right at the beginning of the A2 but an A1L might work if you prefer a less baggy fit. My Flow gi still runs a little large on me after shrinking it down some, but I love it and I just bought one of these in the same size.

If you're holding off ordering a Gi in general, you kind of just need to take a plunge and find something that you sit right in the middle of the size range. With this flow gi, (I don't own a Flow keep in mind) but you'd probably fit in the A2H range the best. You may just need to hem the bottom of your pants a bit or the jacket bottom a bit; jacket size is more important IMO, and usually gis will shrink a bit when you get them.

Depending on the brand, gi sizes can differ. Some brands I use a solid A4. Some I use a solid A3, and some i'm in-between with an A3L. Ordering a little bigger (or making sure you fit, but have enough space) is always the safe way to go because gis shrink much easier than expand :)

I am 6'3, 225lb and I would order this Flow gi in A4 with full confidence it would fit.

You're probably a good candidate for the A2H and allowing it to shrink a bit. My A2L was pretty baggy and long on me (6'1 175) when I first got it. After a few washes with warm water and drying with some heat, the length is perfect and it's a bit on the baggier side but not at all in a bad way.

Don't get inner rash guard lining. It'll make your gi weigh a ton when it's full of sweat, and you'll get so much hotter in that.