It's also been a few years since I last listened to an EL34-based CJ amp & my recollection is in line with yours. It was an integrated amp & delivered terrific midrange but had rolled off highs & lows. While that sound is not atypical w/ EL34 power tubes I thought the CJ amp was a bit too focused on the mids at the expense of the highs & lows.
My current set up consists of a PrimaLuna DiaLogue Premium integrated amp & Spendor S3/5 speakers. So far I've only used EL34's in the amp but it can also take KT88's, KT120's & KT150's. The PrimaLuna can run in triode & ultra-linear modes, & using the latter setting w/ EL34's provides my small Spendors w/ plenty of power & punch. Of course, these monitors don't have a ton of bass, but I've found the DiaLogue Premium S3/5 combo to deliver great midrange w/o sacrificing the highs & lows like the CJ.