Looks like the loop is set up just fine in terms of overall configuration. As Miggs said it would look a bit cleaner if you brought the pump into the case but its well thought out all the same.
I quite like the way you've mounted the rad.
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Xeon 3350/E6750| DFI X38 LT| 2 x 4870|74gb Raptor
Thermalrock Dragon Case (sprayed black)
CPU loop: MCR 220 int.|Apogee GT| MCP655
GPU loop: MCR 320|Swiftech Res.|2x EK FC blocks| MCP655.
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