The above advice on skipping the Seagull for a Yashica Mat 124G or Mamiya C330 is right on the money. I started with a Yashica Mat 124G, used a borrowed C330 and can reccommend them both.
The first time I looked into the waistlevel finder of an old Rollieflex I was hooked. And the first time you print a larger neg... watch out, it's all over. A 4x5 for your birthday and an 8x10 for your anniversary!!