Please help me to select a controller Options

[300SLR]

The way I understand it is that lower values of resistor barrels(45 Ohm,25Ohm etc) are meant for use on larger layouts with longer straights

There are lots of factors in choosing resistor values - some are
Cars with more tyre grip generally need fewer ohms
Cars with magnet traction generally need fewer ohms than the same car without magnet traction
Cars that handle better generally need fewer ohms
Cars with higher current motors often need fewer ohms
Tracks with lower voltage generally need fewer ohms
Tracks without tight corners sometimes need fewer ohms
The length of straights rarely makes much difference to how many ohms are needed
Some drivers prefer less ohms than others.