Philip's Hue GU10's work well with almost anything. A bit pricey but very good. I have them installed in my kitchen and bathroom and I use the colour ones. Only downside is that they dont do green very well.
i have quite a big livingroom with 10 downlights that is on a 2 gang dim-able switch so you can have 5 on or all 10 all are dim-able
ill have a look at switches