Need some input on a Reba fork

[Savage03]

First let me say im still really new to all this so all the reading I have done on here has done nothing but confuse me more and make my decision even harder
Recently I bought a new 2013 Trek Wahoo (back on labor day) and this weekend I want to get a new fork, the stock suntour is horrible so I had it down to a Reba or manitou tower pro...think im set on reba now but here is the things im not sure of....

So the frame has this g2 geometry so do I need a g2 reba? is their sucha thing?
see now their is solo air and dual air which I just spent a hour reading a 3 page thread on the differences but it pretty much went over my head...prices are all over the place on ebay going from 2011 to 2012, is their any difference between the 2 years?

LIke to get a new headset also since the stocker has plastic parts in there and is kinda cheap but im having hard time finding what I need or fits, read to find out if you have tapered or not to check the bottom head tube to if its flanged well it is but the top is also maybe a pic would help?

Lastly the axle debate, mine now is 9mm but see you can goto 15mm is it really something to do or is it for the hardcore guys?
I am not a hardcore rider by any means, just ride on our local path that has rocks and stuff no jumping or anything crazy.

I started out at 225lb im down to 212lb now if that is needed info, plan to get lower

Thanks for any input here and sorry for the newbness, my head hurts from all the reading and info! lol, just wanna pick something and go buy it.

[keen]

This will get you into a head set : Headset Fit Finder . Buy a new fork, Reba might be a little more friendly for heavier riders. I wouldn't worry too much about the fork offset (G2) unless you were super secretive to you current steering. Personally I think 9mm QR's shouldn't be on mountain bikes but going from a 9mm to 15mm usually requires a new hub if the current isn't convertible (many oem hubs are not).

[Savage03]

And then?

Thanks for the link that helped.
Still on the fence for a shock, more I read here the more im leaning back towards Manitou im not a rich guy so need to pick the best I can for the $$$ cause I will have it awhile.

Anyone had experiance with FSA headsets?

[JoeyCapps]

what exactly is wrong with your current fork? I have the same one and Im in your weight class riding trails tougher then what you describe and dont have an issue with it.

I love upgrades as much as the next guy, Im just curious.