The recommended maxiumum length for OM3 laser optimized 50/125um backbone is 300m (984ft) at 10Gb/s. (BICSI TDMM, 11th Edition)
If you want to be in spec to 10G+, then you'll need to go with single-mode fiber. If they need MM and SM, go with the hybrid that Ken recommended. If they only need MM for now, you may still want to recommend the hybrid so they have the SM for future use.
Your Amp LightCrimp kit will certainly work for terminating 62.5 or 50um MM or the single-mode. Just make sure you order the right connectors. The cladding on all three fibers is 125um, so the terminations are exactly the same, you just use different connectors.
If you choose to go with single-mode, you'll need to make sure you have the proper testing equipment. You cannot test SM with a MM light-source.
-Larry
