CGR 3 or 4 wt?

[phiendWMD]

I'm thinking about picking up a Cabela's CGR. I sort of have my mind set on a 6'6" 3wt, but their 3 is 5'9". I'm concerned that's a bit short. Their 4wt is 6'6". I have a few 5wts and really wanted a 3 for diversity. I don't have either a 3 or 4.
It would be mainly used on Lehigh and Little Schuylkill tributaries. Option C is another glass 3wt around 6'6" for less than $150ish if anyone has suggestions.
Thanks.