Hi Aaron and
Suzy is on the money there. If you can go 10" it is well worth the difference. As she says they are about the same length but a fraction fatter and in a LP site will make a diference as to what you can see. Nonetheless the 8" is a good size and you will see heaps.
Not sure what EP's will come with whatever scope you get but I built my scope so had to buy from scratch. The first two eyepieces I got were GSO Superview 20mm and 15 mm. The Superviews have a wider FOV (Feild of view angle) than Plossls and the GSO ones are not a bad price for the quality they give. They are still my most used EP's for nebula, globulars and the moon. They are a good starting point IMO with whatever your scope might come with when you get it.