Id say most options are fine to live without electric folding mirrors unless u have a garage I don't see why you would need them, mfsw just turn the knob on the radio, sunroof all gtis have climate control standard, sat nav you will want to buy the rns 510 anyway better than the one that came factory,parking sensors who really needs them in a hatch back mine are faulty so I just ignore them, heated leather is nice but cloth seats are still nice and the tartan is quite original like the old gti, winter pack headlamp washers are another thing to go wrong and heated cloth isn't really needed heated washer jets still freeze, Xenons really up to you how much you want them I didn't miss them on my gti and my r32 has them and I have a faulty level sensor that causes the lights to dip right down now , armrest I'd say this would be one I'd want I think it looks weird without it, 10 speaker system can't comment on the other one as my 2 cars I've had we're earlier models and came standard with 10, privacy glass if you really wanted you could tint them, dsg is good fun but manual is still nice to drive you may even prefer manual ,18" wheels lets face it you are probably gonna buy some after market bbs or summit, highline display can't say I've used it much get someone with vag com to change any settings to how you want them. I personally like to have as many options as possible to help resale value but could easily live with a standard car because the gti come fairly well speced standard, it's your decision at the end of the day just remember your getting it cheap so will the next person you sell it to.