Well, I guess the thing is, it's easy to get a list of those arrangers under 30 lbs.. Manufacturer specs are easily Googled.
But which one is 'BEST'?

For a start off, hammer, you ask which is 'best'. Well, naturally, you are going to get a predominance of TOTL arrangers, as they ARE the 'best', at least compared to their own line!
But then you go and complain all we are recommending is TOTL (except for the S900). But that's what you asked for!

The 'BEST'...

There are so many 'bests'. Best bang for the buck (probably S900). Best 'live band' sound (toss up between Korg, Audya - still in beta, though - and Roland, IMO), best all rounder (as in, good for live band as well as OMB), the G70 (IMO).
But under 30 lbs., your choices get limited. As Donny would probably say... the 'best' arranger is the one YOU are the most comfortable with. Seeing as how you are familiar with Yamaha (and own two already) that is the OS you are probably best sticking to. And the T3 is only 10% over your limit... a measly three pounds more. For the 'best' TOTL Yamaha they make, surely that's worth it?
For those that think that weight can be shaved from keyboards without losing anything, think about this... Let's say that the individual keys themselves in a G70 weigh ONLY one ounce more than the keys for a regular synth action. There are 76 keys. That's FOUR AND THREE QUARTER POUNDS of extra weight.

Little things can add up. Little things that make a dramatic difference to how something PLAYS.
Better sliders, better, bigger displays, better buttons, more buttons, all these add up. Not much individually, but added together, the pounds just keep coming... It's like dieting! Just how much less ARE you willing to eat?

Ian, I have used minivans and smaller SUV's (Cherokees, that sort of thing) for transport. Having a back door to wheel up to and slide in and out helps. Side door vehicles make this task too difficult, IMO. And, you know what? Whenever faced with a venue that DOES have a lot of stairs, so far I have been lucky that the owner/managers of these places realize the difficulty of their load ins, and if I am struggling, will lend me a barback or waiter for a few minutes (my G70 flight case has handles at both ends as well as the middle). Like I said, I haven't had something I COULDN'T get into yet!
If that new PSR coming has aftertouch, won't that change the type of action they use? But I guarantee you'll LOVE it, no matter what!
