Yant
Head Pro
And get a Lithium, in the long run it's cheaper, and absolutely it's better.
Interested to know more about this, as my current acid battery is on it's last legs. Lithium replacements are in the region of £220, which in comparison to a replacement acid at £80 is significant and would make quite a dent in my wallet.
Why is it cheaper and why is it better? I'm presuming that you are referring to;
The charging time - not an issue for me, i don't care if i need to charge overnight.
The longevity - My (current) acid battery has lasted for over 6 years.