I'm in the process of buying a new hardtail that will see double duty as a trail bike and also a commuter. I hate swapping tires, so I am looking to get a set of tires that have a fast rolling low profile tread that won't be boat anchors on the road and can also work ok on the trail. Most of the trails around here are fairly rocky, some loose sand and some hardpack. Currently I'm looking at the Kenda Small Block 8 or the Maxxis Crossmark. Any opinions on either of these tires? Any other tires that might fit the bill?