Just spent the afternoon comparing the Headlite with the Markbass LMII and LM250, and a Mesa Walkabout.
In a store known for somewhat quirky, erratic pricing, they stacked up like this (all prices are in Canadian $$$): LM 250 $550, LM II $700, Headlite $750, Mesa $1100.
The Headlite's EQ was powerful and quite flexible. The new Enhance circuit is more flexible than the one that was in my old SWR Studio 220. However, with so many tone shaping options, I found it fiddly. The Markbass heads trumped it for ease of use, because their 4 EQ bands are already dialed in for my most common problem frequencies. Who needs a parametric? Similarly, the tiny knobs and pale grey script on the faceplate of the Headlite made it harder to read and adjust than the large, well-marked Mesa.
The SWR sounded loud on sustained notes, but there was something a little processed and compressed about the note envelope. I played around with gain staging, EQ, etc., but couldn't get it to sound as open and dynamic as the Mesa or the Markbass heads. Even at low volumes, the others had more "thump". For this reason, I didn't even try the compressor on the Headlite.
Overall, I would say that the feature set and power-to-weight ratio make the Headlite an awesome micro head. With a good Neo 4*10 or a 2*12, it could be the basis of a super-portable rock rig.
If I absolutely had to have an amp small enough to slip into the pouch on my gig bag, the SWR would be it for me, at least until I get a chance to compare it to the Genz Shuttles and/or the Ibanez Prometheus. Although the Markbass heads are pleasingly light, they're not compact enough for that kind of grab-and-go convenience, and the larger, 13lb Mesa is clearly out of the running.
However, the "good for a micro" tone and quirky dynamic response killed the deal for me. I would rather suffer the inconvenience of needing a backpack or shoulder bag, and enjoy the full-sized tone of the Mesa or the Markbass heads.
The little Markbass 250 really surprised me. Within it's available dynamic range, it sounded just as open and punchy as the LMII. For quieter gigs, I would call it the value leader out of this group.
The other surprise, was the Mesa. I was only shopping for a low power head for coffee house gigs, so I really wasn't intending to look at $1100 amps. However, the Mesa has something, a combination of warmth and clarity, that the others lacked. In this company, it definitely sounded more expensive, and after playing through the Walkabout, the Markbass heads sounded a little "fuzzy" in comparison.
I have an appointment to check out a first-generation AI Clarus next, and I'm desperately hoping that it will do the job. I really don't want to lash out $1K plus on a head for my "little rig".