I'm getting a sharp LC37gd1e next week - all good reviews ... but a review in one of the mags concludes that the picture would be improved if a scaler is added in - suggests i-scan (£600 to buy?). Any advice - do i need one? My telly feed is all though sky + or Sony dav 300 home cinema. Do I really need one, if so i need to get my arguments marshalled as I just spent £2,970 on the Sharp TV!! - "she" may not be amused, eeck!