well the Bose Companion 2.1 is €399,- so i don't think they'll be on par with that xD. They could be on par with the Bose Companion 2 set, but that one doesn't come with a subwoofer. Anyway, i have never heard of Roth (and i am quite the audiophile), but they do look professional. that doesn't say anything about the performance though.
So to be honest, if i were you i'd save up a bit more to get a better sounding system. You could go and buy these, but then i'd suggest you buy them offline in a shop so you can go back to the shop if they don't sound the way you like. even better, maybe you can test them there.
I have also looked into JBL a bit more, and it seems they deliver quite proper home systems. they do cost a bit more, but apparently they deliver good sound. But as ever, if you put more money into it, it generally is better.
so you could try those JBL Creature speakers, but again i suggest you first find a shop to see what they sound like
. over here in the Netherlands we have a kind of shop which sells pretty much everything that has to do with electronics, maybe if you have such a shop in the UK you can go there and try lots of speakers. every ear is different you know
.
if you do that, a good rule of thumb is that when it sounds good, it is good, but how expensive it is mostly depends on what brand you get (like Bose, you pay a lot just for the brand
), and how long you plan to use it. you can throw around Bose speakers all day, because that's party why they're so expensive.
in short, you can buy any brand as long as it sounds good, just take into consideration how long you plan to use them before you get a new set.
another suggestion: i have a Medion MD85500, which is pretty cheap i think, but i've been using it for the past 5 years and has never failed me. it's also a 5.1 set, which is great for movies and gaming alike
. if you can find them, i think you'll be happy with those.