I never had Soundwave as a kid, but I did have some of his tapes. I had Ravage, Rumble, Frenzy, Lazerbeak, Sudgefest & Overkill. I also had(& still have) Blaster, & had some of his tapes(Steeljaw, Rewind, Eject, & Ramhon). I did pick up the Jp reissue of Soundwave, & I think it came with Lazerbeak, & later, I picked up the Toys R Us Soundwave that came with Lazerbeak & Ravage. I also got the (Comic Con?) exclusive Blaster reissue off Hasbrotoyshop.com, & he comes with Eject, Steeljaw, & Ramhorn(not sure why they didn't just go ahead & include Rewind).
Also, it sounds like Hasbro will be releasing Masterpiece Thundercracker in the States. I already have MP Starscream. But I didn't pick up MP Skywarp. I may try tracking him down for a decent price so I can have all 3 of the main seeker's.