They were so cheap i ended up buying 2 to see which one I liked more for cycling. I bought the
RUSHPSF and
SILPPSF -- The SILPPSF model amazon sells for £25
but you can find it for £10.10 (free delivery i think) from RS-Online which is where i bought mine from.
Both are great peices of kit but it generally falls down to the design. Do you prefer the wrap-arounds or standard looking shades?
They do clear versions of these sunglasses as well so you can get whichever you need more.
as an alternative I can strongly recommend these
Tifosi Optics Tyrant 2.0 Photochromic glasses -- They cost more but I find them great for days when the weather shifts from sunny to dark and overcast a lot. They offer a good amount of tint when the sun comes out but still perfectly clear for night use. they are my main glasses for long night rides and commutes. A great pair of multi-weather shades.