Opinions on the Zaph Audio ZRT Revelator Towers ?

I've also had the 2 way ZRT towers for a couple of years.  I assembled them myself in cabinets from Lee Taylor (http://www.taylorspeakers.com.)  Mine are in a smaller central room that that opens up to a couple of larger room on the sides.   I'm really happy with them and would like more of the same.   I'm running them with a Audio Research VSi60 integrated amplifier and play CD's and LP's.  

I'm wondering if I should upgrade the 2 way ZRT to the ZRT 2.5 which has three drivers.    I'm always happy to get a bit more base!

Any thoughts?  I don't think this would be an expensive upgrade as the 2 way speakers would probably sell quickly and Lee Taylor is still around making cabinets.

I dont think you need to sell your 2 way just upgrade.  the kits are the same aren't they? I think it would it be easier to buy some 2.5 crossovers and one more set  the 7' scanspeaks and I  guess you would also have to change your cabinet because they are smaller.  hmmmm.  Unfortunately i cant speak as to what the difference in sound would be from the 2 to 2.5 as Ive never heard the 2 version.   

Im currently running my zrt2.5 with parasound jc1 monoblocks (more than enough power for the speakers) and have them about 4-5 ft off the back wall. I have no sub just the speakers alone and they are great.  Haven't found anything that can beat them in 15 years