i am making the exact same decision
the tosh is a very good TV, but with 2 big flaws. its replacment is due out next month and has 3 HDMI ports
wait if you can
also, the VGA port is useless as 1:1 pixel mapping cannot be achieved. If you intend to hook up your Xbox 360 via VGA so it can upscale DVDs, or if you intend to hook up a media centre then its not the TV for you.
the Sony on the other hand, does do 1:1 pixel mapping over VGA, but only has 1 HDMI
oh, and if you want to make the price comparission any easier, look at the Sony S series. The only thing its missing is the Live Colour Creation. Its a variable brightness backlight which supposedly improves colour. I demod both side by side at the sony centre and could only tell the difference on 1 clip in about 20.
ps the 40" Sony S series can be had for £1223 inc. postage, the Tosh 37 WLT 66 can be had for £1030 inc postage
the 40" V series on the other hand, is £1505 inc postage. some £500 more than the tosh.
edit
some links for you
the VGA mapping discussed
http://www.avforums.com/forums/showthread.php?t=333378
skip to about page 10 as the first couple of pages are quite old and pure speculation. its only later on in the thread that people actually get their TVs and test stuff out
and the announcement of the new Tosh
http://www.t3.co.uk/news/247/entertainment/tv_-_lcd/tosh_trots_out_triple-hdmi_tv_trio
and apparently the Sony is going to be replaced by the 2500 with 2 HDMI. but no word on its release date yet.