Hi Bro, tutunog naman yung speakers mo sa sakura and im definite na kayang pakantahin ng sakura av-200 yung bose speakers mo, but the thing is, you have to listen first to the sounds they will produce, if it will fit enough for your taste then that's it, enjoy your setup and enjoy the Music
As for bro brian mico's advice, its true that speaker's impedance is very important, the higher it's rating, the easier for your amp to drive them, in other words... hindi hirap yung ampli for your speakers
Im also a user of Sakura Av-200 and it has been my main audio setup for my room since i bought it, mga 8mos na rin and it never failed to amuse me, it really is a bang for a buck Tube amp
BTW, im also using a very old bookshelf speakers, Onkyo Liverpool D-200II (150wpc, 89db) and a Samsung HD-748 DVD player (as CD player), and their combination is awesome for my taste