Based on the following: Still learning, and they will take a beating, I would recommend:
http://www.rollerblade.com/products_detail.php?channel_id=9&id_prodotto=1387
You can switch out, remove, replace, etc etc all of the parts. I can't find the weight on it, but I'm sure its not bad. You might want to check for a better price.
http://www.skates.com/Rollerblade-Solo-Tribe-HD-Skates-p/07030200.741.htm
PS: I'm no expert, so you should wait for a few others to voice their opinions as well.
The quick brown fox jumps over the lazy dog