The first time I was exposed to Rectos was when a local band had a couple of them. The band's name was 'Cough' and they were from Winnipeg. The sound out of those things was unbelievable but the guitarists in that band mentioned that the halfstacks cost as much as a car. At that time, it was like $2,500 for the head and $1,250 for the cab new.
Then a guitarist for another band got one and the results were much the same. EVERYONE who had one locally got this AMAZING tone.
I was originally looking at a Nomad55 with a Mesa 4 x 12 but the Nomad never came in for over 4 months so I ended up picking up a recto used at Ultimate Guitar Works! I later scored a side armour 4 x 12 which I had for many years before trading it for Bass Guitar. I think all things equal, I'd prefer the Stiletto / Traditional 4 x 12 for the greater midrange focus.
Favourite recorded recto tones?
Marcus Curiel from POD.
Pete Stewart of Grammatrain
Greg Hetson / Brian Baker from Bad Religion.
The Ataris
Tool
Dream Theater (Octavarium)
Killswitch Engage. (they apparently use boosted Roadsters live)