You have many more options in 40 watt land.I use an EAR intergrated 834 to run my german Odeon demi horns.I used tohave the Ref's as well and like Quad'57/63 owners who have bought and sold and re-bought the same spaker 4 or 5 times in a carreer of this madness I always wish I had kept mine but if I did I'd get bored or upset with their few weak points and want to change out again.It's changing out ITSELF I have a love hate relationship.Between the two models you have chosen tocompare I'd say you'd get better bass and a bit more dynamic slam out of the Mac amps and a more creamy midrange with the CJ's.Remember that in addition to the different manufacturer having different soundsfrom circut designs etc tubes themselves have different characteristics.EL34's used in my Conrad Johnson MV50 used EL34's which were great in mids but had less bass than say my Mesa which used utilitarian 6L6 tubes.Problem with CJ's tube amp[s IMHO is that they are npisier than other brands.EL34's are middle range in price for replacement and a favorite of folks who want to power two way moniotrs with good coherence and not a lot of bass demands (and would work well with the Gallo's).Many CJ's use EL34's.KT88's which if you check prices are more expensive to replace are worth it for many folks in either a 25 watt Mini Mite or a 300 watt monster beacuse they may not have that mid refinement but overall have greater bass and more dynamic slam that EL34's or 6550's which are among cheapest to replace.The 6550 is considered a good untilitarian tube which some deigners like and is supposed to be a pretty balanced tube say betwen the characteristics of the 34 or 88.Think you need to find a shop which has Acoustic Research,Cary,CJ,Mac etc and deice for yourself as difficult as it may be with somebody elses speakers (bring yours they are light!) or room and judge for yourself.In some it's like cheap turntables and CD players for say $500.The turnatable for it's adherents will blow away the CD unless you go to SACD format or get a $20K player.Tubes conversely have there weaknesses but as you all ready heard also psses there streengths that SS does not posses in it's harmonic presentation (good distortion if you will).But differnt amps AND tubes sound different.Your speakers don't need gobs of juice like say Maggies so you have choices (unless you are in va big room but you didn't mention it).set a power range of 40-75 watts go look at prices and sit down with what you can afford and listen.
G'luck
Chazz
G'luck
Chazz