well, if you use the gps or the wi-fi a lot, the battery life isnt so long, but turned off these functions, the p1i-s battery life is more than enough. The music player doesnt use so much energy, and so do the non voip calls, too.
Do you really need 8gb storage in a mobile phone? You can buy a the p1i with gps for ~90.000HUF, and a 4gb m2 card for ~14.000HUF, and you still didnt spend as much, than you would have spent for the n81 8gb.
by the way the sony ericsson's music playing quality is usually better than the nokia's

hé jú! májkroszoft hez kózd tventifájv biljön hungarians forints dimédzs tu dö hángerien pípöl. giv det máni bek. Rájt náó!