get two bi-metal blades, one to put on the saw and one for a back-up... i've had good luck with Olson blades..
i've needed to put casters on my saw for about 10yrs now, i always forget about doing it..
you'll love the saw when you get it tuned up and get some wear on it, they seem to get better with some wear on them... i've had my Buffalo 4x6 for over 10yrs now that i think about it, its been worth every penny...