there should be a sticky on meganes at this stage! This is about the 5th in the last week!
OP, they aren't bad as cars go-good kit, not bad to drive and safe. But there are a lot of horror stories. Some people swear by them but is it really worth the risk? If you want something reliable like you said buy the corolla. Newer VW's aren't as bullet proof as they used be but not bad by any means. Your Polo would be one of the good ones IMO. Have a look at a Skoda Octavia maybe 1.9tdi for max resale on one. Personally, i'd go for a 1.6 Focus if you want trouble free car that size. Also maybe look at a Leon, Civic or a Golf. The Golf, Leon and Octavia are all the same car. I do big miles in a Leon and find it great.
Also you wont get a penny back on the Megane when you sell it on due to their reputation, likewise the C4.
PS-anymore jokes junkyard? Depressed about going back to work in the morning!