The Lords is virtually a non-issue IMO, given that the Commons can pass most legislation without the Lords' consent (via the Parliament Acts).
In theory they are completely wrong, in practice I only see them doing good things.
http://www.publications.parliament.uk/pa/jt201012/jtselect/j...
Nobody argues that juries should be elected, or selected by the police.
Heredity as it is (or rather was) favours white, male (many of the titles couldn't be passed to women), upper class, privately educated, wealthy, christian individuals.