I would add to Kurt's great post. I would have you seriously check out a Sumiko Celebration (new from @$1100, to used for much less)
Works much more friendly with your unipivot bearing, than any Shelter cart. Better frequency extremes than a Koetsu, or 501, yet has this killer midrange and huge soundstage;Meat on dem bones - great midrange also.
Keep in mind, I have a Basis/Vector combo with my Celebration. The Basis bass can be as big as any table, but you cannot use bass lite carts like the 501, with bass lite arms like the 1.5. The Celebration is even top to bottom - when properly loaded(same as with any cart). As is the Vector - and thus the Basis TT can have a great bottom end. But if you use a light bottom end cart like the 501 or a Koetsu, with your 1.5 tonearm, with the energy the Shelter is going to feedback into your Graham, I think there are better choices. Your thoughts on a Denon 103R is a great way to go, can't go wrong there - I just think the Shelters aren't the best match to your arm (search the archives for others thoughts here as well). Let alone the Basis TT (at least the 501, the 901 and 90x match MUCH better to the TT, but still not to your arm)
Works much more friendly with your unipivot bearing, than any Shelter cart. Better frequency extremes than a Koetsu, or 501, yet has this killer midrange and huge soundstage;Meat on dem bones - great midrange also.
Keep in mind, I have a Basis/Vector combo with my Celebration. The Basis bass can be as big as any table, but you cannot use bass lite carts like the 501, with bass lite arms like the 1.5. The Celebration is even top to bottom - when properly loaded(same as with any cart). As is the Vector - and thus the Basis TT can have a great bottom end. But if you use a light bottom end cart like the 501 or a Koetsu, with your 1.5 tonearm, with the energy the Shelter is going to feedback into your Graham, I think there are better choices. Your thoughts on a Denon 103R is a great way to go, can't go wrong there - I just think the Shelters aren't the best match to your arm (search the archives for others thoughts here as well). Let alone the Basis TT (at least the 501, the 901 and 90x match MUCH better to the TT, but still not to your arm)