The 45degree bit wouldn't work as it would hit other components and wouldn't save you any space in a case.
Socket 775 cpu's aren't a good match for mini-itx as they are desktop chips not low power and heat.
The lv-677 has the s479 cpu's and all of the rest of those bits on the list, whilst being much cooler and quieter. Mines running with pretty much a northbridge cooler on it with a 40mm fan.