The Recto Pre is a strange beast in that respect... where there is GAIN for days for Rhythm work, but for lead work you have to make adjustments...sometimes. This may be partially due to the way Mesa approaches the Modern Rectifier Amps. I guess, for the average Recto user, they'd be using it for Grinding Rhythm work first and lead tones a distant 2nd.
The Recto Pre is an awesome amp, with a good lead tone...but, I do find myself using an Overdrive pedal to smooth out the rough edges and add some life to my legato playing. As of late though, I've been using a Triaxis, Studio Pre, 2:100 and a mic'd cab for lead tones as I love the sound and feel of Mark-ish leads.
I've had the Recto Pre for exactly two years and I'm still finding out different ways of approaching this amp.
For one, recording at higher sample rates (24/96 for example) improves the character of the amp dramatically, for me.
Two, you certainly never want to set the gain on 100%.