I'd personally go for the Tosh. I've had a tosh for over 10 years. I have a huge 37" CRT Dolby Digital that is now at my brothers and looks as good today as it did when I first bought it.
I now have the 37XV505DB and got it from Amazon for £520 a couple of months ago. Once you get through setting the contrast, brightness, colour and backlight to a more subtle level the set looks the part. I run Sky HD through it, a media centre PC running 1080p for Blu Ray discs and DVD player also that upscales standard dvds. The HD picture alone is excellent and goes that one step further with a full HD 1080p picture. Also has Freeview and an "Exact Scan" option where you see the full picture and no overscan. 3x HDMI's also.
The sound is ok as they use the Onkyo system which has been used for a while now. It's bass is fine, and have an option to purchase an additional sub woofer if need be, but to be fair if I'm watching movies via the tv, I use my DD amp.
My other brother had a 32" LCD Samsung and the Freeview tuner in it is knackered already and the HDMI socket isn't too clever. However of course not all are the same, so he's been unlucky. He now has the Tosh 42XV505DB which inspired me to upgrade mine from the Tosh 32WL66. I am in agreement with B-29 about Toshiba tv's.
If in doubt, as Praxidike said, get to your local Comet, Currys etc and compare some tv's. Of course it all depends how they are wired up, some use scarts and even the dreaded RF, however they are getting better and have loops for HDMI cables now, but depends on the material that they are showing. Also bear in mind that it's unlikely that these stores will have changed the picture settings and probably have the brightness, contrast, backlight on full which seems to be the norm for manufacturers to set their tv's up on. So you will never see a tv in a store at it's full potential unless you go to a dedicated Hi-fi store such as Richer Sounds etc who would be happy to set the tv up for you as I've experienced.
I'm busy currently backing-up my dvd collection to the DVD Library feature within Windows Vista's updated Media Centre and is great. One click and you are there watching a DVD, no fiddling about changing discs.