combo for 2x12 open back 18w marshall

I'm getting a 18W early plexi style amp built which will be going into a 2x12 open back bluesbreaker style cab.

I play blues, blues rock and classic rock with my clean tone being reminisant of Hendrix's Little Wing/SRV's Lenny and the crucnh being like Billy Gibbons-Gary Moore at the heaviest.

I knew a greenback styled speaker would be the best choice for the style of music I play, but was wondering which would be the best speaker for my needs.

I've had good experiences with greenback/v30 mixes, although I've never owned one so I'd like to try mixing speakers out

I'm slightly worried that

• the Green Beret may loose too much bottom in the open backed cab
• the standard Reaper may have too scooped a midrange for the classic greenback middle throat-like tone
• the Invader may be where my head is at the moment

Pairing one of those with either the

• Retro 30, advertised as brighter. I don't really like "brighter" amps, but I hear it's a great combination
• Veteran 30, probably the front runner in this cataegory

I'm really confussed, so any and all help would be greatly appreciated.