Magnex is ok as a kind of budget-entry system for the 182. Milltek is kinda mid-range, it all depends on the budget I guess. At the time I bought this it fitted my budget perfectly.
The sound is nice, not too loud unless booting it really, infact under normal driving it's hard to notice it's there at all. Certainly not boomy around town anyway.
As for price, well wanting kinda £150+ to be honest.