i am thinking of getting a pair of front clear turn signals for my 94 E420. i've seen some on sale on ebay. my questions are

1) is there a brand that's better than the rest? i mean, these clear turn signals are after market parts, right? does someone make better clear signals than others? if so, which brand do you recommend?

2) how difficult would it be to install? any hints that people want to advise?

thanks