Having had these crt`s pass through my hands recently,I would like to share my impressions of differences in Picture quality,pros & cons etc. First I will start by saying ALL are cracking 8" crts & the pic differences are minor. (*all were judged using the same source material/cables.dvd player etc.) Picture; The Barco 808s-I love the Barco pic,very natural colours-though a tad "cold",good resolution,very good blacks,very bright. The Marquee 8500-Almost a "silky" pic,Magnificent blacks,colours quite 'Barcolike",same brightness as the Barco.Filmic 3d look to the pic that I feel the Barco in its presentation lacks. The G70-Possibly the best all rounder-better blacks than the Barco,more "technicolour" colour-as bright as both of the above.Great 3d effect-though not as good as the Marquee. Nec XG-Not quite as bright as the above 3 -though not so you would really notice,best colours,blacks not quite as good as the Marquee but resolution,fine detail and sharpness quite a bit in front of the other 3. Same filmic 3d look as the Marquee.This projector was probably the biggest surprise to me in terms of how sharp-something I put down to the amount of tweaking parameters you have with this-way more than the other 3 .The 100 point convergence implementation being the BIG bonus in being able to dial in a great pic. Case(Looks!) Barco case is a nice design-though a little long. Marquee case? well you either love `em or hate `em,Industrialised look -built like a tank! G70..ugly bugger but great to be able to adjust lens focus without taking the case off. Nec XG-Best looking case of the lot but awkward to adjust focus. Ease of setup; I think the Barco wins this battle ,followed by the Marquee then the G70.The XG is very easy to setup but so many parameters means it will take a lot longer to do. Longevity of tubes?;(Based on factory settings.) The NEC wins this one-tubes not burning so bright will last longer,followed by the Marquee..then a tossup for last place between the Barco and the Sony. Support; There is support for ALL these models from a number of sources-and spares readily available for all,Marquees are still being produced,Barcos -easy to get bits,followed by Sony & Nec. Having said this,Ive never had a problem getting Sony or Nec spares,Nec specifically being very popular in the u.s. I realise the above is very basic & Im quite willing to elaborate if needs be,but If someones new to crt and wonders about the differences and what they are in a nutshell-this is my 5 cents as the yanks say! Certainly in the u.k. for sometime we had a choice of Barco..Barco ..or Barco and a false perception i.m.h.o. grew that Barco 808s were the best and only 8" to have. This wasnt helped by the fact that some that sold predominantly Barco tended to "ignore" the other 8"-and in some instances -trash all else. The truth is that they are ALL very..very..close in quality and it comes down to personal choice .Now is a great time for crt`ers because these other models can be seen and had-giving people the opportunity to decide for themselves what they think is the best rather than be told whats the best. But I wont tell you what my current fave is!