i have a gift voucher and would like to purchase a cordless phone(s). had a looksee and there's too many to choose from. DECT, WDECT, 2.4GHz, 5.8GHz, 900MHz ? ideally, i want one to wall mount(?) and the 2nd unit to place elsewhere. don't want to end up with a lemon so i'm asking for peeps real world opinions or expertise. what ya got, are ya happy or not with your purchase. which one should i get or best avoid. here are the catagories. much appreciated.